Add a new 'type_visibility' attribute to allow users to

control the visibility of a type for the purposes of RTTI
and template argument restrictions independently of how
visibility propagates to its non-type member declarations.

Also fix r175326 to not ignore template argument visibility
on a template explicit instantiation when a member has
an explicit attribute but the instantiation does not.

The type_visibility work is rdar://11880378

llvm-svn: 175587

clang/lib/CodeGen/CodeGenModule.cpp

@@ -347,7 +347,7 @@ void CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV,
     return;
 
   // Don't override an explicit visibility attribute.
-  if (RD->getExplicitVisibility())
+  if (RD->getExplicitVisibility(NamedDecl::VisibilityForType))
     return;
 
   switch (RD->getTemplateSpecializationKind()) {